diff --git a/tools/valgrind/MPICH.supp b/tools/valgrind/MPICH.supp
index 53c090e215..80c6b66624 100644
--- a/tools/valgrind/MPICH.supp
+++ b/tools/valgrind/MPICH.supp
@@ -121,3 +121,221 @@
    fun:PMPI_Init
    ...
 }
+{
+   MPICH_library1
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+   ...
+   fun:Run
+   fun:*
+   fun:*
+   fun:Run
+   ...
+}
+{
+   MPICH_json1
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   ...
+   fun:parse_json_tree
+   fun:MPIR_Csel_create_from_buf
+   fun:*
+   fun:*
+}
+{
+   MPICH_comm1
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:*
+   fun:MPIR_Find_local
+   fun:*
+   fun:MPIR_Comm_commit
+   fun:MPIR_init_comm_world
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+   ...
+   fun:Run
+   fun:*
+   fun:*
+}
+{
+   MPICH_comm2
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:*
+   fun:MPIR_Find_external
+   fun:*
+   fun:MPIR_Comm_commit
+   fun:MPIR_init_comm_world
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+   ...
+   fun:Run
+   fun:*
+   fun:*
+}
+{
+   MPICH_comm3
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:*
+   fun:MPIR_Find_local
+   fun:*
+   fun:MPIR_Comm_commit
+   fun:MPIR_init_comm_self
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+   ...
+   fun:Run
+   fun:*
+   fun:*
+}
+{
+   MPICH_comm4
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:*
+   fun:MPIR_Find_external
+   fun:*
+   fun:MPIR_Comm_commit
+   fun:MPIR_init_comm_self
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+   ...
+   fun:Run
+   fun:*
+   fun:*
+}
+{
+   MPICH_psm3_1
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   ...
+   fun:psm3_ep_open_internal
+   fun:psm3_ep_open
+   fun:*
+   fun:psmx3_sep_open
+   fun:*
+   fun:*
+   fun:MPIDI_OFI_init_local
+   fun:*
+   fun:*
+}
+{
+   MPICH_psm3_2
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:*
+   fun:psm3_strdup_internal
+   fun:psm3_hal_pre_init_cache_func
+   fun:*
+   fun:psm3_info_query
+   fun:psmx3_update_nic_info
+   ...
+   fun:MPIDI_OFI_init_local
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+}
+{
+   MPICH_psm3_3
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:*
+   fun:psm3_strdup_internal
+   fun:psm3_stats_register_type_internal.part.0.lto_priv.0
+   fun:*
+   fun:*
+   fun:ips_proto_register_stats
+   fun:psm3_ips_proto_init
+   fun:*
+   fun:psm3_ep_open_internal
+   fun:psm3_ep_open
+   fun:*
+   fun:psmx3_sep_open
+   fun:*
+   fun:*
+   fun:MPIDI_OFI_init_local
+}
+{
+   MPICH_psm3_4
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   ...
+   fun:psm3_ep_open
+   fun:*
+   fun:psmx3_sep_open
+   ...
+   fun:MPIDI_OFI_init_local
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+}
+{
+   MPICH_hwloc1
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:hwloc_connect_children
+   fun:hwloc_connect_children
+   fun:hwloc_connect_children
+   fun:hwloc__reconnect
+   fun:hwloc_x86_discover
+   fun:*
+   fun:*
+   fun:hwloc_topology_load
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+}
+{
+   MPICH_hwloc2
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   fun:hwloc_connect_children
+   fun:hwloc__reconnect
+   fun:hwloc_x86_discover
+   fun:*
+   fun:*
+   fun:hwloc_topology_load
+   ...
+   fun:PMPI_Init
+   fun:lammps_mpi_init
+   fun:lammps_mpi_init
+   fun:lammps_open
+   fun:*
+   fun:*
+   fun:*
+}